Bobbin-winder.



' No. 785,812.l PATENTED MAR.28,1905.

R. H. LBGG.

BOBBIN WINDER.

APPLIOATION FILED MAR. 7, 1904.

5y/@M by UNITED STATES Patented March 28, 1905.

ROLAND 4H. LEGG, OF OARTHAGE, MISSOURI.

BOBBlN-WINDER.

SPECIFICATION forming part of Letters Patent No. I785,812, dated March 28, 1905.

Application filed March 7, 1904. Serial No. 197,024.

f tion.

This invention relates to improvements in bobbin-winders, and particularly to bobbinwinders employed for the waxed thread used in machines for sewing leather articles.

One of the principal objects of the invention is to provide a b obbin-'winder capable of attachment to any ordinary7 sewing-machine, or it may be employed as a separate machine to be driven by any power and in which after the starting of the winding operation the thread will be wound until a desired quantity has accumulated on the bobbin, after which the thread will be instantly severed.

A further object of the invention is to provide a novel form of cutter so mounted and arranged as to permit its convenient removal for resharpening.

A still further object of the invention is to provide a meansV for adjusting the quantity of thread to be placed on a bobbin or spool.

A still further object of the invention is to provide an improved means for positively locking the cutter from movement. and thus prevent accidental cutting of the thread during the starting of the winding operation.

lVith these and other objectsin view, as will more fully hereinafter appear, the invention consists in the novel construction and arrangenient of parts hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size, and minor details ofthe structure may be made without depart-- ing from the spirit or sacrificing any of the advantages of the invention. v

In the accompanying' drawings, Figure 1 is a perspective view of a bobbin-winder constructed in accordance with the invention. Fig. 2 is a transverse sectional elevation ofthe same. Fig. 3 is a detail perspective View of a slightly -modiiied construction of knifeguide. Fig. 4 is a detail perspective view of the catch for preventing accidental release of the knife.

Similar characters of reference are employed to indicate corresponding parts through the several figures of the drawings.

In the drawings, l indicates a suitable baseplate, which may be secured in position on a sewing-machine or any other support, the device being intended for use principally as an attachment for sewing-machines, although it may be constructed as a separate independent bobbin-winding machine. The base carries a pair of standards Q 3, and supported in one of the standards is a whirl, the spindle of which is arranged for engagement with one end of a bobbin, as at fc. The opposite standard carries a longitudinally-adjustable arbor 6 for engaging' the opposite end of the bobbin.

At one side of the base is a horizontallydisposed rod 7, on which is mounted a loose thread-guiding roller 8, which travels from end to end of the rod as the thread is gradually wound on the bobbin, the thread being guided to the bobbin by means of any ordinary form of spring-held guides in order to keep the thread under the necessary tension.

At a point between the rod 7 and the bobbin-supports are arranged two vertically-disposed guiding-posts 10, having threaded upper ends for the reception of nuts or stops ll. These posts serve as guides for a knife-carrying bar l2, the end portions of which are of suitable shapeto embrace the posts, or the posts may be provided with longitudinal grooves to receive pins projecting from the knife-carrier, as illustrated in Fig. 3. 1n this case the top of the posts` may be provided with threaded openings for the reception of screws l1 in order to limit upward movement of the knife. The knife-carrier supports a cutting-blade 14 of a length approximately equal to the length of the bobbin, and when the blade is dull from constant use the nuts may be removed and the carrier and blade lifted from the posts for convenience in regrinding. The blade may be elevated by one or more springs l5, that are secured to the base-plate, or separate helical springs l5 may be disposed on the posts.

The base is cut away to receive a knife- IOO locking catch 17, which projects up through l thread-cutter, a catch for holding the cutter,

an opening in the base and engages the knifecarricr, so that the thread may be wound on the bobbin without coming into contact with the blade. The rear end of this catch is connected to one arm of the bell-crank lever 1S, that is pivotally mounted on a supporting-pin 19, and the opposite arm of the bell-crank lever is disposed adjacent to the bobbin in position to be acted upon by the thread being wound. The approximately vertical arm of the bellcrank lever is provided on its upper face with a plate or disk that may have one edge secured to the arm, and against this bears an adjusting-screw carried by the bell-crank lever. By turning' this screw the plate may be adjusted to different distances from the axis of the bobbin, and thus adjust the time at which the amount of thread on the bobbin will move the catch to cutter-releasing position. The apparatus may be thus employed in connection with bobbins of different size and adapted to contain different quantities of thread.

The operation will be readily understood. The thread is started on the bobbin, which is then placed in position to be engaged by the whirl,while the knife is locked down by means of the catch. The wind ing is automatic and continues until suflicient thread has accumulated to cause outward movement of the bell-crank lever, at which time the catch will be disengaged and the knife will be forced upward by its springs into contact with the thread.

1t is obvious that the device requires no attention on the part of the operator, and lilled bobbins may thus be kept on hand for use in sewing-machines.

In order to prevent accidental release of the knife during the starting of the winding operations, a pivoted catch 25 is mounted on the base-plate, and said catch may be moved to a position to engage the bell-crank lever should the latter tend to move outward to catch-releasing' position.

Having thus described the invention, what is claimed isl. The combination with bobbin supporting and revolving means, of a spring-pressed a catch-releasing lever, and an adjustable disk or plate carried by the lever and disposed in position adjacent to the thread.

2. The combination with bobbin supporting and rotating means, of a knife, means for impelling the same in the direction of the thread, a catch for holding the knife, a lever for releasing the catch, a disk having an adjustable connection with the lever and disposed in position to be engaged by the thread on the bobbin, and a screw carried by the lever and serving as an adjusting means for the disk.

3. The combination with bobbin supporting and rotating means, a knife-carrier, knifeguiding posts, removable stops at the ends of the posts for limiting movement of the knife, a spring for impelling the knife-carrier in the direction of the thread, a catch for holding the knife, and means for releasing' said catch.

4. The combination with bobbin supporting and rotating means, of a knife-ca1rier,ver tically-disposed guiding-posts 'for the knifecarrier, said posts having' threaded upper ends, nuts arranged on the threaded ends of the posts, a knife supported by the carrier, a spring for moving the knife-carrier in the direction of the thread, a catch for engaging' the knifecarrier, and means for automatically releasing said catch and permitting movement of the knife into engagement with the thread.

5. The combination with bobbin supporting and rotating means, of a thread-cutting knife, means for impelling the knife toward the thread, a catch for holding the knife, a thread-engaged lever for releasing the catch, and means adjustable into the path of movement of said lever for preventing' outward movement of the latter to an extent suflicient to release the catch.

In testimony that I claim the foregoing as my own I have hereto afliXed my signature in the presence of two witnesses.

ROLAND H. LEGG.

Witnesses: h

E. NV. lVIoFARLAND, R. N. ALEXANDER. 

